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Athouel, L., Arcidiacono, P., Ramirez-Castro, C., Crosnier, O., Hamel, C., Dandeville, Y., Guillemet, P., Scudeller, Y., Guay, D., Belanger, D. & Brousse, T. (2012) Investigation of cavity microelectrode technique for electrochemical study with manganese dioxides. Electrochim. Acta, 86 268–276.
Added by: Laurent Cournède (2016-03-10 21:28:37) |
| Type de référence: Article DOI: 10.1016/j.electacta.2012.06.004 Numéro d'identification (ISBN etc.): 0013-4686 Clé BibTeX: Athouel2012 Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: behavior, birnessite, capacitors, Cavity microelectrode, charge-storage properties, charge/discharge, Cryptomelane, electrochemical supercapacitor, Electrode materials, Manganese dioxide, mno2, nanostructured mno2, oxide, reactivity, Supercapacitor, Surface Créateurs: Arcidiacono, Athouel, Belanger, Brousse, Crosnier, Dandeville, Guay, Guillemet, Hamel, Ramirez-Castro, Scudeller Collection: Electrochim. Acta |
Consultations : 1/672
Indice de consultation : 5% Indice de popularité : 1.25% |
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Crystallized manganese dioxide powders (cryptomelane type alpha-MnO2 and birnessite type delta-MnO2) were electrochemically investigated in mild aqueous electrolytes with the cavity microelectrode (CME) technique. Cyclic voltammetry was performed with isolated MnO2 powder and mixed acetylene black/MnO2 powder. High electrochemical performance is achieved showing the pseudocapacitive behavior of cryptomelane and the birnessite signature, which is exhibited by large, intense and more defined peaks, than for a composite electrode. The microcavity electrode (about 10(-3) mm(3)) allows studies with only a few micrograms of MnO2 powder in order to display its intrinsic electrochemical behavior and to improve the understanding of the role of the different components in the composite electrode performance. (C) 2012 Elsevier Ltd. All rights reserved.
Added by: Laurent Cournède |